calling uninstall plugin endpoint without specifying a version leads to runtime error

[xsalefter]

In plugin management API, we have docs to uninstall plugin without specifying a version. But if we're doing this, we got an error:

2026-03-31 01:00:25 [bus_ext_events-th] INFO  o.k.b.o.b.k.i.DefaultPluginManager - Starting uninstallation of plugin: pluginKey=<plugin-key>, version=null
2026-03-31 01:00:25 [bus_ext_events-th] INFO  o.k.b.o.b.k.i.DefaultPluginInstaller - Starting uninstallation of plugin: <plugin-key> version: null
2026-03-31 01:00:25 [bus_ext_events-th] ERROR o.k.b.o.b.k.i.DefaultPluginManager - Error uninstalling plugin: pluginKey=<plugin-key>, version=null, error=Cannot call #getPluginVersion() since PluginNamingResolver created without 'version'
java.lang.IllegalStateException: Cannot call #getPluginVersion() since PluginNamingResolver created without 'version'
	at org.killbill.commons.utils.Preconditions.checkState(Preconditions.java:44)
	at org.killbill.billing.osgi.bundles.kpm.impl.PluginNamingResolver.getPluginVersion(PluginNamingResolver.java:64)
	at org.killbill.billing.osgi.bundles.kpm.impl.DefaultPluginFileService.getPluginDirByPluginKeyAndVersion(DefaultPluginFileService.java:64)
	at org.killbill.billing.osgi.bundles.kpm.impl.DefaultPluginInstaller.uninstall(DefaultPluginInstaller.java:83)
	at org.killbill.billing.osgi.bundles.kpm.impl.DefaultPluginManager.uninstall(DefaultPluginManager.java:261)
	at org.killbill.billing.osgi.bundles.kpm.EventsListener.handleKillbillEvent(EventsListener.java:115)
....

The resolution is either:

1 - Support this

• Determine the version "source of truth". Could be the plugin_identifiers.json, or just read the /plugins/<sub-dir> directly?
• What we need to do if there's multiple versions plugin exists?

2 - Not support this

Changes the docs that the version parameter is required.